diff --git a/packages/frontend/src/account.ts b/packages/frontend/src/account.ts
index b91834b94..f5a74a058 100644
--- a/packages/frontend/src/account.ts
+++ b/packages/frontend/src/account.ts
@@ -5,12 +5,12 @@
 
 import { defineAsyncComponent, reactive, ref } from 'vue';
 import * as Misskey from 'misskey-js';
+import { apiUrl } from '@@/js/config.js';
+import type { MenuItem, MenuButton } from '@/types/menu.js';
 import { showSuspendedDialog } from '@/scripts/show-suspended-dialog.js';
 import { i18n } from '@/i18n.js';
 import { miLocalStorage } from '@/local-storage.js';
-import type { MenuItem, MenuButton } from '@/types/menu.js';
 import { del, get, set } from '@/scripts/idb-proxy.js';
-import { apiUrl } from '@@/js/config.js';
 import { waiting, popup, popupMenu, success, alert } from '@/os.js';
 import { misskeyApi } from '@/scripts/misskey-api.js';
 import { unisonReload, reloadChannel } from '@/scripts/unison-reload.js';
@@ -165,7 +165,18 @@ function fetchAccount(token: string, id?: string, forceShowDialog?: boolean): Pr
 	});
 }
 
-export function updateAccount(accountData: Partial<Account>) {
+export function updateAccount(accountData: Account) {
+	if (!$i) return;
+	for (const key of Object.keys($i)) {
+		delete $i[key];
+	}
+	for (const [key, value] of Object.entries(accountData)) {
+		$i[key] = value;
+	}
+	miLocalStorage.setItem('account', JSON.stringify($i));
+}
+
+export function updateAccountPartial(accountData: Partial<Account>) {
 	if (!$i) return;
 	for (const [key, value] of Object.entries(accountData)) {
 		$i[key] = value;
diff --git a/packages/frontend/src/boot/main-boot.ts b/packages/frontend/src/boot/main-boot.ts
index 8bcc3463b..bd0482596 100644
--- a/packages/frontend/src/boot/main-boot.ts
+++ b/packages/frontend/src/boot/main-boot.ts
@@ -4,14 +4,14 @@
  */
 
 import { createApp, defineAsyncComponent, markRaw } from 'vue';
+import { ui } from '@@/js/config.js';
 import { common } from './common.js';
 import type * as Misskey from 'misskey-js';
-import { ui } from '@@/js/config.js';
 import { i18n } from '@/i18n.js';
 import { alert, confirm, popup, post, toast } from '@/os.js';
 import { useStream } from '@/stream.js';
 import * as sound from '@/scripts/sound.js';
-import { $i, signout, updateAccount } from '@/account.js';
+import { $i, signout, updateAccountPartial } from '@/account.js';
 import { instance } from '@/instance.js';
 import { ColdDeviceStorage, defaultStore } from '@/store.js';
 import { reactionPicker } from '@/scripts/reaction-picker.js';
@@ -291,11 +291,11 @@ export async function mainBoot() {
 
 		// 自分の情報が更新されたとき
 		main.on('meUpdated', i => {
-			updateAccount(i);
+			updateAccountPartial(i);
 		});
 
 		main.on('readAllNotifications', () => {
-			updateAccount({
+			updateAccountPartial({
 				hasUnreadNotification: false,
 				unreadNotificationsCount: 0,
 			});
@@ -303,39 +303,39 @@ export async function mainBoot() {
 
 		main.on('unreadNotification', () => {
 			const unreadNotificationsCount = ($i?.unreadNotificationsCount ?? 0) + 1;
-			updateAccount({
+			updateAccountPartial({
 				hasUnreadNotification: true,
 				unreadNotificationsCount,
 			});
 		});
 
 		main.on('unreadMention', () => {
-			updateAccount({ hasUnreadMentions: true });
+			updateAccountPartial({ hasUnreadMentions: true });
 		});
 
 		main.on('readAllUnreadMentions', () => {
-			updateAccount({ hasUnreadMentions: false });
+			updateAccountPartial({ hasUnreadMentions: false });
 		});
 
 		main.on('unreadSpecifiedNote', () => {
-			updateAccount({ hasUnreadSpecifiedNotes: true });
+			updateAccountPartial({ hasUnreadSpecifiedNotes: true });
 		});
 
 		main.on('readAllUnreadSpecifiedNotes', () => {
-			updateAccount({ hasUnreadSpecifiedNotes: false });
+			updateAccountPartial({ hasUnreadSpecifiedNotes: false });
 		});
 
 		main.on('readAllAntennas', () => {
-			updateAccount({ hasUnreadAntenna: false });
+			updateAccountPartial({ hasUnreadAntenna: false });
 		});
 
 		main.on('unreadAntenna', () => {
-			updateAccount({ hasUnreadAntenna: true });
+			updateAccountPartial({ hasUnreadAntenna: true });
 			sound.playMisskeySfx('antenna');
 		});
 
 		main.on('readAllAnnouncements', () => {
-			updateAccount({ hasUnreadAnnouncement: false });
+			updateAccountPartial({ hasUnreadAnnouncement: false });
 		});
 
 		// 個人宛てお知らせが発行されたとき
diff --git a/packages/frontend/src/components/MkAnnouncementDialog.vue b/packages/frontend/src/components/MkAnnouncementDialog.vue
index 1adb244c9..3045a4758 100644
--- a/packages/frontend/src/components/MkAnnouncementDialog.vue
+++ b/packages/frontend/src/components/MkAnnouncementDialog.vue
@@ -29,7 +29,7 @@ import { misskeyApi } from '@/scripts/misskey-api.js';
 import MkModal from '@/components/MkModal.vue';
 import MkButton from '@/components/MkButton.vue';
 import { i18n } from '@/i18n.js';
-import { $i, updateAccount } from '@/account.js';
+import { $i, updateAccountPartial } from '@/account.js';
 
 const props = withDefaults(defineProps<{
 	announcement: Misskey.entities.Announcement;
@@ -51,7 +51,7 @@ async function ok() {
 
 	modal.value?.close();
 	misskeyApi('i/read-announcement', { announcementId: props.announcement.id });
-	updateAccount({
+	updateAccountPartial({
 		unreadAnnouncements: $i!.unreadAnnouncements.filter(a => a.id !== props.announcement.id),
 	});
 }
diff --git a/packages/frontend/src/components/MkSelect.vue b/packages/frontend/src/components/MkSelect.vue
index a2ec384ac..8bd02000e 100644
--- a/packages/frontend/src/components/MkSelect.vue
+++ b/packages/frontend/src/components/MkSelect.vue
@@ -16,9 +16,8 @@ SPDX-License-Identifier: AGPL-3.0-only
 		@keydown.space.enter="show"
 	>
 		<div ref="prefixEl" :class="$style.prefix"><slot name="prefix"></slot></div>
-		<select
+		<div
 			ref="inputEl"
-			v-model="v"
 			v-adaptive-border
 			tabindex="-1"
 			:class="$style.inputCore"
@@ -26,27 +25,25 @@ SPDX-License-Identifier: AGPL-3.0-only
 			:required="required"
 			:readonly="readonly"
 			:placeholder="placeholder"
-			@input="onInput"
 			@mousedown.prevent="() => {}"
 			@keydown.prevent="() => {}"
 		>
-			<slot></slot>
-		</select>
+			<div style="pointer-events: none;">{{ currentValueText ?? '' }}</div>
+			<div style="display: none;">
+				<slot></slot>
+			</div>
+		</div>
 		<div ref="suffixEl" :class="$style.suffix"><i class="ti ti-chevron-down" :class="[$style.chevron, { [$style.chevronOpening]: opening }]"></i></div>
 	</div>
 	<div :class="$style.caption"><slot name="caption"></slot></div>
-
-	<MkButton v-if="manualSave && changed" primary :class="$style.save" @click="updated"><i class="ti ti-device-floppy"></i> {{ i18n.ts.save }}</MkButton>
 </div>
 </template>
 
 <script lang="ts" setup>
 import { onMounted, nextTick, ref, watch, computed, toRefs, VNode, useSlots, VNodeChild } from 'vue';
-import MkButton from '@/components/MkButton.vue';
-import * as os from '@/os.js';
 import { useInterval } from '@@/js/use-interval.js';
-import { i18n } from '@/i18n.js';
 import type { MenuItem } from '@/types/menu.js';
+import * as os from '@/os.js';
 
 const props = defineProps<{
 	modelValue: string | null;
@@ -56,25 +53,20 @@ const props = defineProps<{
 	placeholder?: string;
 	autofocus?: boolean;
 	inline?: boolean;
-	manualSave?: boolean;
 	small?: boolean;
 	large?: boolean;
 }>();
 
 const emit = defineEmits<{
-	(ev: 'changeByUser', value: string | null): void;
-	(ev: 'update:modelValue', value: string | null): void;
+	(ev: 'update:modelValue', value: string | number | null): void;
 }>();
 
 const slots = useSlots();
 
 const { modelValue, autofocus } = toRefs(props);
-const v = ref(modelValue.value);
 const focused = ref(false);
 const opening = ref(false);
-const changed = ref(false);
-const invalid = ref(false);
-const filled = computed(() => v.value !== '' && v.value != null);
+const currentValueText = ref<string | null>(null);
 const inputEl = ref<HTMLObjectElement | null>(null);
 const prefixEl = ref<HTMLElement | null>(null);
 const suffixEl = ref<HTMLElement | null>(null);
@@ -85,26 +77,6 @@ const height =
 	36;
 
 const focus = () => container.value?.focus();
-const onInput = (ev) => {
-	changed.value = true;
-};
-
-const updated = () => {
-	changed.value = false;
-	emit('update:modelValue', v.value);
-};
-
-watch(modelValue, newValue => {
-	v.value = newValue;
-});
-
-watch(v, () => {
-	if (!props.manualSave) {
-		updated();
-	}
-
-	invalid.value = inputEl.value?.validity.badInput ?? true;
-});
 
 // このコンポーネントが作成された時、非表示状態である場合がある
 // 非表示状態だと要素の幅などは0になってしまうので、定期的に計算する
@@ -134,6 +106,31 @@ onMounted(() => {
 	});
 });
 
+watch(modelValue, () => {
+	const scanOptions = (options: VNodeChild[]) => {
+		for (const vnode of options) {
+			if (typeof vnode !== 'object' || vnode === null || Array.isArray(vnode)) continue;
+			if (vnode.type === 'optgroup') {
+				const optgroup = vnode;
+				if (Array.isArray(optgroup.children)) scanOptions(optgroup.children);
+			} else if (Array.isArray(vnode.children)) { // 何故かフラグメントになってくることがある
+				const fragment = vnode;
+				if (Array.isArray(fragment.children)) scanOptions(fragment.children);
+			} else if (vnode.props == null) { // v-if で条件が false のときにこうなる
+				// nop?
+			} else {
+				const option = vnode;
+				if (option.props?.value === modelValue.value) {
+					currentValueText.value = option.children as string;
+					break;
+				}
+			}
+		}
+	};
+
+	scanOptions(slots.default!());
+}, { immediate: true });
+
 function show() {
 	if (opening.value) return;
 	focus();
@@ -146,11 +143,9 @@ function show() {
 	const pushOption = (option: VNode) => {
 		menu.push({
 			text: option.children as string,
-			active: computed(() => v.value === option.props?.value),
+			active: computed(() => modelValue.value === option.props?.value),
 			action: () => {
-				v.value = option.props?.value;
-				changed.value = true;
-				emit('changeByUser', v.value);
+				emit('update:modelValue', option.props?.value);
 			},
 		});
 	};
@@ -248,7 +243,8 @@ function show() {
 .inputCore {
 	appearance: none;
 	-webkit-appearance: none;
-	display: block;
+	display: flex;
+	align-items: center;
 	height: v-bind("height + 'px'");
 	width: 100%;
 	margin: 0;
diff --git a/packages/frontend/src/pages/announcement.vue b/packages/frontend/src/pages/announcement.vue
index 3840e6a49..01c29cf02 100644
--- a/packages/frontend/src/pages/announcement.vue
+++ b/packages/frontend/src/pages/announcement.vue
@@ -55,7 +55,7 @@ import * as os from '@/os.js';
 import { misskeyApi } from '@/scripts/misskey-api.js';
 import { i18n } from '@/i18n.js';
 import { definePageMetadata } from '@/scripts/page-metadata.js';
-import { $i, updateAccount } from '@/account.js';
+import { $i, updateAccountPartial } from '@/account.js';
 import { defaultStore } from '@/store.js';
 
 const props = defineProps<{
@@ -90,7 +90,7 @@ async function read(target: Misskey.entities.Announcement): Promise<void> {
 	target.isRead = true;
 	await misskeyApi('i/read-announcement', { announcementId: target.id });
 	if ($i) {
-		updateAccount({
+		updateAccountPartial({
 			unreadAnnouncements: $i.unreadAnnouncements.filter((a: { id: string; }) => a.id !== target.id),
 		});
 	}
diff --git a/packages/frontend/src/pages/announcements.vue b/packages/frontend/src/pages/announcements.vue
index 688a54298..75c0fd98d 100644
--- a/packages/frontend/src/pages/announcements.vue
+++ b/packages/frontend/src/pages/announcements.vue
@@ -56,7 +56,7 @@ import * as os from '@/os.js';
 import { misskeyApi } from '@/scripts/misskey-api.js';
 import { i18n } from '@/i18n.js';
 import { definePageMetadata } from '@/scripts/page-metadata.js';
-import { $i, updateAccount } from '@/account.js';
+import { $i, updateAccountPartial } from '@/account.js';
 
 const paginationCurrent = {
 	endpoint: 'announcements' as const,
@@ -94,7 +94,7 @@ async function read(target) {
 		return a;
 	});
 	misskeyApi('i/read-announcement', { announcementId: target.id });
-	updateAccount({
+	updateAccountPartial({
 		unreadAnnouncements: $i!.unreadAnnouncements.filter(a => a.id !== target.id),
 	});
 }
diff --git a/packages/frontend/src/pages/settings/2fa.vue b/packages/frontend/src/pages/settings/2fa.vue
index a76b748ac..776f59dda 100644
--- a/packages/frontend/src/pages/settings/2fa.vue
+++ b/packages/frontend/src/pages/settings/2fa.vue
@@ -84,7 +84,7 @@ import FormSection from '@/components/form/section.vue';
 import MkFolder from '@/components/MkFolder.vue';
 import MkLink from '@/components/MkLink.vue';
 import * as os from '@/os.js';
-import { signinRequired, updateAccount } from '@/account.js';
+import { signinRequired, updateAccountPartial } from '@/account.js';
 import { i18n } from '@/i18n.js';
 
 const $i = signinRequired();
@@ -123,7 +123,7 @@ async function unregisterTOTP(): Promise<void> {
 		password: auth.result.password,
 		token: auth.result.token,
 	}).then(res => {
-		updateAccount({
+		updateAccountPartial({
 			twoFactorEnabled: false,
 		});
 	}).catch(error => {